Valve



(No Model.) I

J. G L SMIT VALVE; No. 293.240. k Patented Feb. 12, 1884.

U IT D Srnrns PATENT Gimme;

J. MORTIMER GOLDSMITH, or BOSTON, MASSACHUSETTS.

VALVE,

SPECIFICATION forming part of Letters Patent No; 293,240, dated February12, 1884.

Application filed August 13. 1883.

0 all whom it may concern.-

Be it known that I, J. MORTIMER GOLD- SMITH, of Boston, county ofSuffolk, State of Massachusetts, have invented an Improvement in Valves,of which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

My invention relates to a valve of the class known as a register valve,in which the valve proper, provided with openings, has a rotary slidingmovement on a seat with corresponding openings, the invention beingintended as an improvement on a valve for which Letters Patent N 0.261,547 were granted to me July 25, 1882. In register-valves the face ofthe valve is ground to fit accurately upon the seat with such tightnessthat it is exceedingly difficult for any matter to getbetween thewearing-surfaces to lubricate them, so that they are liable in time tobecomeworn,so as to no longer fit accurately;

One of the objects of the present invention is to obviate thisdifficulty by reducing the area of the contact or wearing surface of thevalve orits seat, thereby enabling it to be more easily ground, and alsopermitting the lubricating material to have access to thewearing-surface.

The invention also consists in various details of constructionhereinafter to be described.

Figure l is a longitudinal section of a valve embodying this invention;Fig. 2, a horizontal section thereof; Fig. 3, a side elevation ofthevalve proper and a portion of itsstem, and Fig. 4 a face view of thevalve proper.

The valve consists of the main case or shell it, having inlet and outletopenings 12 c, and a I partition, d, between them, a portion of the saidpartition being ground smooth to form a valveseat, d, having a series ofopenings or ports, e, The valve proper f consists, essentially,of a diskhaving a series of corresponding ports or openings, f. The face of thesaid valve that bears on the seat is provided with a series of pocketsor recesses, z, of the same size and shape as theports in the valveseat,thus reducing the actual contact or wearing-surface of the valve to aband lying around the edge of the said recesses. At the periphery of thevalve, adjacent to the portsthereof, its under face is No model.)

\ also recessed, as shown at m, thus enabling the fluid passing throughthe valve to have access to the portion of its wearing-face underlyingthe periphery of the valveproper, enabling this portion to be lubricatedby the said fluid as the valve is opened and closed. The upper portionof the valve-case a, through which the valve proper, f, is inserted, isprovided witha cap or bonnet, n, which, in small-sized valves, isscrewed thereto, the said cap having the guidepassage n for thevalve-stem 0, operated by the handle 0. e

In my former patent referred to the movement of the valve inopening andclosing was limited by a stop-projection on the handle engaging stops onthe valve-stem socket, which is screwed to the case 'a.

The valve-case a is provided with a stopgroove, p, an d after the valveis properly ground to its seat it is provided with a stop pin or projection, T, which, by its engagement with the end of the groove 1),arrests the movement of the valve in the proper position to register correctly with the ports of the valveseat.

The valve-stem o is provided with a shoulder, 0", engaging a seat at theinner end of the valve-steIn-guide passage n in the cover or, to operateas a packing for the said stem, and in order to provide as'uitableconnection between the valve-stem and valve, to enable them to bepressedagainst their seats in opposite directions, thevalve is providedwitha tubular central hub, f having one or more projections, f",entering corresponding notches 0 in a tubular hood or sleeve, 0*,projecting downward from the shoulder o of the valve-stem. The said hood0 and hub f receive between them the spring t, by which the valve properand shoulder 0 of the valve-stein are pressed to their respective seatsin the absence of fluidpressure in the valve;

I claim--- I 1. In a register-valve, the co'n1bination,witl1 the portedseat, of the valve proper, having corresponding ports, openings, andpockets or 5 recesses in the wearing-face of the valve between the saidport-openings, substantially as and for the purpose set forth.

2. The ported valve-seat and valve having corresponding ports,and-having its periphery IOO notched adjacent to the said ports,substan- In testimonywhereof IhaVesigned myname tially as and for thepurpose described. to this specification in the presence of two sub- 103. The Valve-seat and valve, having a rescribing Witnesses. cessed hubcombined with the valve-stem, havr 5 ing a shoulder and recessedhood,anda spring MORTIMER GOLDSMHH' inelosed in the said hub and hood, whichare en- W'itnesses: gaged with one another, substantially as de- J 08.P. LIVERMORE,

scribed. W. H. SIGSTON.

